Calculating-machine.



A. A. A. DREYFUS & A. H. LEVY.

GALCULATING MAGHINE.

APPLIUATION FILED Nov.21,19os.

932,255. Patented Aug. 24, 1909.

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il ITED STATES PATENT @FFQE RHAND ALBERT ABRAHAM DREYFUS, 0FliIANDSVVORTH,u NEAR BRMINGHAM, AND ALFRED HENRY VICTOR LEVY, GFEDGBASTON, EmMNGHAl, ENGLAND.

CALCULAT ING-MACHINE Specification of Letters Patent.

Patented Aug. 2a, 1969.

Application filed November 2l, 1908. Serial No. 463,821.

which the following isa specification.

lhis invention relates to calculating inachines, and has for its objectto provide a new and snnphed construction of machine for mechanicallyadding or subtracting any series of figures or numbers.

.Figure l of theA accompanying drawings represents a plan of acalculator constructed in accordance with this invention. Fig. 2 is asection on. line Fig. l. Fig. 3 represents a section on line m1 Fig. l.Fig. 4

. is a plan and section of the hundreds l indica-tor. Fig. represents asuitable forni of style which may be used for operating the machine.-

The same ligures of reference indicate corresponding parts in each ofthe gures of the dra-wing. l

The base plate l has 'its edge 2 .raised as shown., so as to formfsaidplate into a hollow (lished shape. Around said edge 2 a. continuousseries of numbers are marked in series of lO-that is to say, from l tol0, 1 to 20, l to B0-from l up to 100, the latter, however, not beingseen owing to being covered by the plate 7 hereafter referred to. Tithinthe hollow interior of said base plate 1a central disk 3 is arranged,said disk being pivotally mounted at a so as to be capable of beingfreely rotated. The edge of this disk is provided with a series ofnotches orteeth 5, equal in number -to the figures around the edge ofthe base plate, While near the edge of the disk, and opposite to saidnotches, is a series .of numbers 6, from l to 100, the latterbeing'indicated by Zero. Fixed upon the outer edge 2 is a plate 7,

' which extends over the edge ofthe rotatable disk 3, and is provided atits outer end with a horizontally projecting tongue 8, the outer -end ofthe plate being bent up as shown, so as to bring .said tongue 8a shortdistance above the face ot' said disk 3. .In this plate 7. is formed 'anaperture 9 which comes iin- -niediately over the figures 6 on the disk,so

as to expose one of the latter therethrough. There is also formed in thesaid plate, near its inner end, a gap l0 whose inner end comes oppositeto the Zero niark on the edge 2 of the base l. Formed in said disk 3near the gures 6, is a ring of rectangular holes ll, each of which isarranged opposite to one of said figures, and equal in number to thelatter.

Pivoted upon the disk 3 at its center 4, is a radial bar l2, whose outerend extends to within.l a short distance of the edge of said disk. [Thisbar l2 is transversely corrugated as shown, so as to give same a springconstructionwhile its outer end is bent down at 13, and carries a pin14, upon which is loosely mounted a star wheel l5, whose .bottom toothor projection engages within one of the holes ll. The tongue S of theplate 7 isarranged so that it extends over the holes 1l, and in the pathtraversed by the upper tooth of the Wheel i5 when the disk 3 is rotatedas hereafter described so that when said disk is so rotated that 'thebar l2 moves past the tonguel 8, the top tooth of said wheel l5 engageswith the latter, so that said wheel, in wiping past the tongue, iscaused to turn upon the pin lil, and cause the bottoni tooth to leavethe hole 11 in which it was previously engaged,.and the next tooth toenter or snap into the adjacent hole,the bar l2 moving angularly uponthe center 4. The spring construction of the bar serves to always insurethe star wheel fully engaging with the holes l1.

Aknob or handle 16 is provided upon the bar 12' for turning saine byhand when required.

The pin le is preferably provided at its outerend with a pointed head17,' which points directly from one of the holes 11, and indicates thenumber to which the particular hole engaged by the star-wheel,corresponds. The bar l2 is capable of being lifted to disengage the starwheel from the holes ll, and of being moved to any position around thedisk as required. Theoperation of the inat zero mark on the disk 3. mustbe brought beneath the aperture 9 of the plate 7, and with the starwheel l5 engaging inthe zero hole, lFor-the purpose of adding a seriesof LO @Ei-.cath the aperture 9.

numbers, for instance, 50, 35 and 4:5, after the machine has been placedin its zero position as above described, a suitable style or the like'(such as shown in Fig. 5, and marked i8) is 'placed in the notch in thedisk 3, which is opposite the igure 50 on the outside 'ring of figures,and brought round into the recess l() of the plate 7, When the numberV50 of the igures 6 Will appear be- The style is then placed in thenotch opposite to the figure 35 of the outside ring, and drawn around asbefore, the number now appearing beneath the aperture peated withrespect to the number 4:5, the style -being placed inthe `notch oppositethis number on the said outside ring, andbrought around to the recess 8.This will bring the bar 12 past the plate 7, thereby causing the toptooth of the star Wheel to engage With the tongue 8' and cause thelatter to ,turn upon its pin, and to engage with the next holeoppositeto the ligure l, and thus indicates that 10'0 has been added, While theiigure 20 appears beneath the aperture 9. The total sum Will thereforebe 120,of which 100 is indicated by the star Wheel, While the 20 isindicated by the aperture 9. For' each eXtra hundred added, the starWheel moves into another hole, and thus automatically registers same.

In order to subtract tWo numbers, the figures upon the disk 3 representthe niinuend andthe numbers upon the outer ring 2 the subtrahend. Thusto subtract 47 from SAIL, the style is placed in the notch opposite tothe figure S4, and moved around until opposite to the number 47 upon theperipheral portion 2, when 37, the difference between the tivo numbers,Will appear beneath the aperture 9. Should. the tivo numbers be, forinstance. 129 and 5T, the style is placed in the notch opposite tonumber 29, and turned past the plate 7, being lifted thereover untilsame comes opposite to number 57 on the outer ring, thus displaying thediiierence, 72, in the aperture 9. Or for the same example the style maybe turned in the opposite and shortest direction to the number 57-toattain the same result and Without the necessity ef lifting the saineover the plate 7. Certain examples 'may, however, involve the necessityof lifting the style over the plate 7, and this may be very easily andquickly done without. substantially inter rupting the operation.

By the calculator as shownv in the drawings, a total of 9999 can beadded.

Having fully described our said invention, what We desire to claim andsecure by Letters Patent is l l. A calculating machine comprising a baseplate marked With a series of numbers, a rotatable disk mounted uponsaid base plate and having a. series of numbers marked 9. The operation-is then rearound same corresponding to .the numbers upon said ba'seplate, said disk having a series of holes formed therein, an indicatordevice engaging in said holes, and means for engaging with said deviceonce every revolution of'the disk so asto cause ,same to engage with thenext adjacent hole, the ma chine being o erated as described.

'2. A cacu ating machine comprising a base plate marked with a series ofnumbers,

a. rotatable d isk mounted upon said base plate and having a series ofnumbers marked around same corresponding to the numbers upon thebase-"plate, 4said disk having an annular series of numbered holesformed therein, an indicator device having means engaging in saidholes,and a projecting part carried by the base plate adapted to engage withsaid means once every revolution of the disk, so as to cau-se thesame toengage with the next adjacent hole, the machine being operatedasdescribed.

3. A calculating machine comprising a base plate marked with a series ofnumbers,

a rotatable disk mounted upon said base plate and having a series ofnumbers marked around same corresponding to the niinbers upon the baseplate, said disk having an annular 4series of numbered holes .formedtherein, a star Wheel engaging in said holes, and a projecting partcarried by the base plate adapted to engage with said star- Wheel onceevery revolution of the disk, so as to cause same to engage with thenext adjacent hole.

4. A calculating machine comprising a base plate marked with a series ofnumbers,

a rotatable disk mounted upon said base plate and having a series ofnumbers marked around same corresponding to the numbers` upon the baseplate, said disk having an annular' series of numbered holes formedtherein, a star wheel engaging in said holes, a movable radial barcarrying said p'heel atits outer end, and a projecting part carried L.

by the base plate and adapted to engage with said star-Wheel once uponevery revolution of the disk, so as to cause same to engage with thenext adjacent hole.

5. A calculating machine comprising a base plate marked with a series ofnumbers, a rotatable disk mounted upon said base plate and having aseries of numbers marked around same corresponding to the numbers uponthe `base plate, said disk having an annular series of numbered holesformed therein, a star-Wheel engaging in said holes, a movable radialbar carrying said wheel at its outci end, a plate carried by the edge ofthe base plate extendingovei' the edge of thev disk, said plate havinganaperture arranged to expose therethrough one oi the figures on'thedisk,.and a projectingstongue at the outer end of said plate adapted toengage with said star-Wheel once every revolution of the disk, so as tocause same to engage With thm-next adjacent hole, the parts operating asdescribed.

6. A calculating machine comprising a base plate marked'with a series ofnumbers around its edge, a rotatable disk pivotal'ly mounted upon saidbase plate, so that said numbers on the latter come outside theperiphery of said disk, the lat-ter having its edge portion formed witha series ot' notches corresponding to the numbers upon the base plate, aseries of numbers upon said disk opposite to said notches, said diskhaving a series of numbered holes formed therein, a star-wheel engagingwith said holes, and a projecting part carried by the edge of the baseplate adapted to engage with said starvvheel once every revolution ofthe disk, so

A as to cause same to engage with the next adjacent hole, the partsoperating as described.

7. A calculating machine comprising a base plate marke with a series ofnumbers around a raised outer edge, a rotatable disk pivot-ally mountedupon said base plate, so that said numbers on the latter come outsidethe periphery of said disk, the latter having its edge portion formedWith a series of -notches corresponding to the numbers upon the baseplate, a` series of numbers upon said disk opposite to said notches,said disk having also an annular series of holes formed therein, astar-wheel engaging in said holes, al movable radial bar `carrying saidWheel at its outer end, a plate carried by the edge ot' the base plateextending o"er the edge of the disk, an aperture in said plate arrangedto expose therethrough one ot' the figures on the disk, and a projectingtongue at the outer end ot' said plate adapted to engage With saidstar-Wheel once every revolution otl the disk, so as to .canse same'toengage with the next adja-- cent hole, the parts, being arranged andoperating as described.

8. A calculating machine comprising a base plate marked with a series ofnumbers around its edge, a rotatable disk mounted upon said base plateand having a 'series of numbers marked around same corresponding to thenumbers upon the base plate', saiddisk having an annular series of holesformed therein, ay star-Wheel engaging in said holes, a novable radialbar of spring construction carrying said Wheel at its outer end, andserving to maintain said Wheel in full engagement with said holes, and aproject-ing part carried b the base plate adapt-v ed to engagewith saistar-Wheel once every revolution of the disk so as to cause same toengage with the next adjacent hole, the

parts operating a's described.

9. A calculating machine comprising a base plate marked With a series ofnumbers around araised outer edge, a rotatable disk pivotally mountedupon said base plate, so that said numbers on the latter come outsidethe periphery of said disk, the latter having its edge portiofn Jrormedwitha series ot' notches corresponding to the numbers upon the baseplate, said disk also having a series of numbers marked thereon oppositeto said notches, and an annular series of numbered holes formed therein,a starwheel engaging in said hol/es, a rotatable andtransversely-corrugated radial bar of spring construction pivoted at thecenter of the disk, and carrying said wheel at its outer end, a platecarried by the edge of the b-ase'plate extending over the edge ot' the.disk, said plate having an aperture, arranged 'to expose therethroughone of the numbers on the disk, and a projecting tongue at the outer endof said plate adapted to engage with said star-wheel once everyrevolution of the disk, so asto cause same to engage with the nextadjacent hole, the Whole operating as described.

l0. A calculating machine comprising a base plate marked with a seriesof numbers around a raised outer edge, a rotatable disk pivotallymounted upon said base plate, so

that said numbers on the latter come outf gated radial bar ot springconstruction pivoted at the center of the disk and carrying saidstar-Wheel at its outer end, a plate carried by the edge oi the baseplate extending over the edge of the disk, said plate having an aperturearranged to expose the number on the disk thereunder, said plate havingalso a gap or recess at one side plate immediately over the zero mark ofthe base thereof, and `a projecting tongue at the outer end of saidplate adapted to engage With said star-Wheel once every revolution ofthe disk, so as to cause same to engage With the next adjacent hole, theparts being arranged and operating as described and set forth.

In testimony whereof We have hereunto set our hands in presence of twosubscribing Witnesses.

ARMAND ALBERT ABRAHAM DREYFUS. ALFRED HENRY VICTOR L'EYY. Witnesses:

HENRY NORTON SKERRETT, HARRY OsMoND PRATT.

